Feature: Refactor _DesktopDrawer to support expandable/collapsible states, introduce glass effect panel design, and refine navigation UI.

finlog_app/app/lib/core/app_shell.dart

@@ -1,3 +1,5 @@
+import 'dart:ui' show ImageFilter;
+
 import 'package:app/core/app/router.dart';
 import 'package:app/core/app/features/feature_controller.dart';
 import 'package:app/core/i18n/translations.g.dart';
@@ -130,8 +132,6 @@ class _AppShellState extends State<AppShell> {
     }
 
     final appBar = AppBar(
-      // title: const _LogoHeader(),
-      // Kein Burger-Button, da mobil ohne Drawer (BottomNav) und Desktop mit persistentem Drawer
       leading: null,
       actions: [
         IconButton(
@@ -218,11 +218,7 @@ class _AppShellState extends State<AppShell> {
       appBar: appBar,
       body: Row(
         children: [
-          // Persistent drawer area
+          _DesktopDrawer(items: items, selectedIndex: selected),
-          SizedBox(
-            width: 300,
-            child: _DesktopDrawer(items: items, selectedIndex: selected),
-          ),
           const VerticalDivider(width: 1),
           // Content
           Expanded(
@@ -240,7 +236,7 @@ class _AppShellState extends State<AppShell> {
   }
 }
 
-class _DesktopDrawer extends StatelessWidget {
+class _DesktopDrawer extends StatefulWidget {
   final List<
     ({IconData icon, IconData? selectedIcon, String label, String route})
   >
@@ -249,20 +245,30 @@ class _DesktopDrawer extends StatelessWidget {
 
   const _DesktopDrawer({required this.items, required this.selectedIndex});
 
+  @override
+  State<_DesktopDrawer> createState() => _DesktopDrawerState();
+}
+
+class _DesktopDrawerState extends State<_DesktopDrawer> {
+  bool _expanded = true; // start expanded
+
+  // You can tweak this threshold if needed.
+  static const double _collapseWidth = 88.0; // collapsed width
+  static const double _expandWidth = 280.0; // expanded width
+  static const double _switchAtWidth = 160.0; // below this, use icon-only mode
+
   @override
   Widget build(BuildContext context) {
-    final scheme = Theme.of(context).colorScheme;
+    final cs = Theme.of(context).colorScheme;
     final fc = context.read<FeatureController>();
 
     bool routeEnabled(String route) {
       if (route.startsWith(AppRoute.home.path)) return true;
       if (route.startsWith(AppRoute.settings.path)) return true;
-
       if (route.startsWith(AppRoute.budget.path)) return fc.hasHousehold;
       if (route.startsWith(AppRoute.inventory.path)) return fc.hasInventory;
       if (route.startsWith(AppRoute.car.path)) return fc.hasCar;
       if (route.startsWith(AppRoute.reports.path)) return fc.hasReports;
-
       return true;
     }
 
@@ -270,7 +276,7 @@ class _DesktopDrawer extends StatelessWidget {
       animation: fc,
       builder: (context, _) {
         final visibleItems = [
-          for (final it in items)
+          for (final it in widget.items)
             if (routeEnabled(it.route)) it,
         ];
 
@@ -283,37 +289,96 @@ class _DesktopDrawer extends StatelessWidget {
           }
         }
 
-        return Material(
+        final double targetWidth = _expanded ? _expandWidth : _collapseWidth;
-          elevation: 0,
+
-          child: SafeArea(
+        // Use the same tint as mobile glass bar: cs.surface.withOpacity(0.65)
-            child: ListTileTheme(
+        final Color panelColor = cs.surface.withOpacity(0.65);
-              selectedColor: scheme.onSecondaryContainer,
+
-              selectedTileColor: scheme.secondaryContainer,
+        return SafeArea(
-              child: ListView(
+          child: Padding(
-                padding: const EdgeInsets.symmetric(vertical: 8),
+            padding: const EdgeInsets.all(12),
-                children: [
+            child: ClipRRect(
-                  // const Divider(),
+              borderRadius: BorderRadius.circular(20),
-                  for (var i = 0; i < visibleItems.length; i++)
+              child: BackdropFilter(
-                    ListTile(
+                filter: ImageFilter.blur(sigmaX: 14, sigmaY: 14),
-                      selected: i == safeSelected,
+                child: AnimatedContainer(
-                      leading: Icon(
+                  duration: const Duration(milliseconds: 220),
-                        i == safeSelected
+                  curve: Curves.easeOutCubic,
-                            ? (visibleItems[i].selectedIcon ??
+                  width: targetWidth,
-                                  visibleItems[i].icon)
+                  decoration: BoxDecoration(
-                            : visibleItems[i].icon,
+                    color: panelColor,
-                      ),
+                    borderRadius: BorderRadius.circular(20),
-                      title: Text(visibleItems[i].label),
+                    border: Border.all(
-                      onTap: () => context.go(visibleItems[i].route),
+                      color: cs.outlineVariant.withOpacity(0.40),
                     ),
-                  // Optional: Settings als fixer Eintrag,
+                    boxShadow: [
-                  // falls du ihn unabhängig von items immer unten haben willst:
+                      BoxShadow(
-                  // const Divider(),
+                        color: cs.shadow.withOpacity(0.04),
-                  // ListTile(
+                        blurRadius: 18,
-                  //   leading: const Icon(Icons.settings_outlined),
+                        offset: const Offset(0, 8),
-                  //   title: Text(t.app.navigationSettings),
+                      ),
-                  //   onTap: () => context.go(AppRoute.settings.path),
+                    ],
-                  // ),
+                  ),
-                ],
+                  child: LayoutBuilder(
+                    builder: (context, constraints) {
+                      final bool narrow = constraints.maxWidth < _switchAtWidth;
+
+                      return Column(
+                        children: [
+                          // --------- CONTENT ----------
+                          Expanded(
+                            child: ListView(
+                              padding: const EdgeInsets.symmetric(vertical: 8),
+                              children: [
+                                for (var i = 0; i < visibleItems.length; i++)
+                                  narrow
+                                      ? _CollapsedIconItem(
+                                          icon:
+                                              visibleItems[i].selectedIcon ??
+                                              visibleItems[i].icon,
+                                          tooltip: visibleItems[i].label,
+                                          selected: i == safeSelected,
+                                          onTap: () =>
+                                              context.go(visibleItems[i].route),
+                                        )
+                                      : _ExpandedDrawerItem(
+                                          icon: visibleItems[i].icon,
+                                          selectedIcon:
+                                              visibleItems[i].selectedIcon ??
+                                              visibleItems[i].icon,
+                                          label: visibleItems[i].label,
+                                          selected: i == safeSelected,
+                                          onTap: () =>
+                                              context.go(visibleItems[i].route),
+                                        ),
+                              ],
+                            ),
+                          ),
+
+                          const Divider(height: 1),
+
+                          // Expand/Collapse button (same behavior as before)
+                          IconButton(
+                            tooltip: _expanded
+                                ? Translations.of(
+                                    context,
+                                  ).app.tooltipCollapseRail
+                                : Translations.of(
+                                    context,
+                                  ).app.tooltipExpandRail,
+                            onPressed: () =>
+                                setState(() => _expanded = !_expanded),
+                            icon: Icon(
+                              _expanded
+                                  ? Icons.keyboard_double_arrow_left
+                                  : Icons.keyboard_double_arrow_right,
+                            ),
+                          ),
+                        ],
+                      );
+                    },
+                  ),
+                ),
               ),
             ),
           ),
@@ -322,3 +387,103 @@ class _DesktopDrawer extends StatelessWidget {
     );
   }
 }
+
+class _ExpandedDrawerItem extends StatelessWidget {
+  const _ExpandedDrawerItem({
+    required this.icon,
+    required this.selectedIcon,
+    required this.label,
+    required this.selected,
+    required this.onTap,
+  });
+
+  final IconData icon;
+  final IconData selectedIcon;
+  final String label;
+  final bool selected;
+  final VoidCallback onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    final cs = Theme.of(context).colorScheme;
+
+    return InkWell(
+      onTap: onTap,
+      borderRadius: BorderRadius.circular(12),
+      child: Container(
+        margin: const EdgeInsets.symmetric(horizontal: 8, vertical: 2),
+        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+        decoration: BoxDecoration(
+          color: selected
+              ? cs.primaryContainer.withOpacity(0.35)
+              : Colors.transparent,
+          borderRadius: BorderRadius.circular(12),
+        ),
+        child: Row(
+          children: [
+            Icon(
+              selected ? selectedIcon : icon,
+              size: 22,
+              color: selected ? cs.onPrimaryContainer : cs.onSurfaceVariant,
+            ),
+            const SizedBox(width: 16),
+            Expanded(
+              child: Text(
+                label,
+                style: Theme.of(context).textTheme.labelLarge?.copyWith(
+                  color: selected ? cs.onPrimaryContainer : cs.onSurfaceVariant,
+                ),
+                overflow: TextOverflow.ellipsis,
+                maxLines: 1,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class _CollapsedIconItem extends StatelessWidget {
+  const _CollapsedIconItem({
+    required this.icon,
+    required this.tooltip,
+    required this.selected,
+    required this.onTap,
+  });
+
+  final IconData icon;
+  final String tooltip;
+  final bool selected;
+  final VoidCallback onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    final cs = Theme.of(context).colorScheme;
+
+    return Tooltip(
+      message: tooltip,
+      waitDuration: const Duration(milliseconds: 400),
+      child: InkWell(
+        onTap: onTap,
+        borderRadius: BorderRadius.circular(12),
+        child: Container(
+          margin: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+          padding: const EdgeInsets.symmetric(vertical: 10),
+          decoration: BoxDecoration(
+            color: selected
+                ? cs.primaryContainer.withOpacity(0.35)
+                : Colors.transparent,
+            borderRadius: BorderRadius.circular(12),
+          ),
+          alignment: Alignment.center,
+          child: Icon(
+            icon,
+            size: 22,
+            color: selected ? cs.onPrimaryContainer : cs.onSurfaceVariant,
+          ),
+        ),
+      ),
+    );
+  }
+}